Pipe-thread protector



Nov. 9 1926. 1,606,341

5. BROWNSTEIN PI PE THREAD PROTECTOR iF'iled Jan. 30. 1926 Patented UNITED STATES. PATENT OFFICE...

BENJAMIN BBOWNSTEIN, 0F ELLWOOD CITY, PENNSYLVANIA PIPE-THREAD PROTECTOR.

Application filed January 30; 1926. Serial No. 84,983.

This invention relates to thread protectors for pipes. Every furnished pipe that is made is with one coupling which is screwed on one end of'the pipe and which protects the screw threads at one end of the pipe. ever, thereon,

The opposite end of the pipe, howis sent out with a thread protector these thread protectors being cheaper than couplings.

The reason thread protectors are provided is to prevent the threads from being damaged in handling and shipping, this being necessary because the joints in pipe depend up is used in gas lines, threads so Since one on perfect threads, and when pipe steam lines, water lines, oil and it is important to have good that perfect joints can be made.

coupling is always used on one end of each joint the couplings or protectors which are used at the other end of the pipe for protecting the threads cannot be used and are wasted.

Obviously these protectors cannot be used inasmuch as they are thrown away by the users, therefore, manufacturers are seeking as protector which far as possible a cheap thread shall fulfill the requirements of the case and not be expensive.

The general object of my invention is to provide a thread protector which fulfills the above requirements due to the fact that it is made from sheet metal in punch presses in a few operations arid eliminates the most expensive operation, namely, Another object is to ing.

that of threadprovide a construction which will eliminate heating of cylinder ready welding and, when the protectors from plates, the many drawing that are required to produce a for the threading operation.

A further object is to form a protector which will fit any threads of a given size taper or number of and can be easily screwed on or ofi without any trouble and without any special wrench.

My invent-ion is illustrated in the accompa nying drawings wherein Figure 1 is a top plan new of my thread protector in applied position u Figure on a pipe;

2 is an elevation o the thread protector and pipe shown in Figure 1;

Figure 3 is a section on Figure 1;

the line 33 of Figure 4 is a section on the line 4-4 of Figure 3;

Flgure 5 is a fragmentary elevation of formed of a sheet metal blank which is bent into a circle and this protecting sleeve so formed being designated 10-. The upper end of the'blank is cut away at a plurality of points, as at -11, forming vertical slots and the metal between these slots is turned angularly inward to form a stop 12. Preferably there are two of these stops disposed in opposite relation, as illustrated in Fig- I are 1. For the purpose of causing the protector to engage with the screw threads of the pipe upon which it is placed, and hold the protector in place against dis lacement, I form the sheet metal blank low the stops, with inwardly extending tongues 13, these tongues being formed by cutting an approximately U- haped slot through the metal and striking inward the tongue defined by said slot so that this tongue will be disposed at an angle to the body of the blank less than a ri ht angle. This construction permits t e protector to screwed downward upon the screw threads or unscrewed when it is desired to remove the protector.

For the purpose of engaging the ends of the blank with each other I may form the blank with the tongues 14. which extend atv right angles to the length of the blank and extend inward from the middle line of the blank, the remainder of the blank beyond this tongue being cut away and the tongue being separated from the body of the blank by the relatively wide slit 15. The tongue =14 on one end of the blankextends in the reverse direction to the tongue 14 on the opposite end of the blank and thus it will be seen that these two tongues may be interlocked to thus hold the ends of the blank closed. This joining of the ends of the mg tongues 14 are bent at right angles to the body of the blank. The blank is then formed into a ring and the joint interlock ing tongues are engaged with each other and then flattened out which completes the protector. It will be noted that the recesses 11 formed in the upper edge of the protector bypressing the stop lugs 12 inward,

constitute means whereby a rod or shank may be engaged with the protector to screw it down upon the pipe A or to unscrew it therefrom without the necessity of using any special wrench. While I have illustrated two stops it will be obvious that more stops might be used and the same is trueof the number of thread engaging lugs 13. In Figure 7 I have illustrated another means for interlocking the ends ofvthe blank which consists in forming upon one end of' the blank a relatively wide tongue 16 and forming the other end of theblank with a slot 17 through which this tongue projects, this slot being relatively narrow so that a when the blank is expanded the head 16 will means whereby a shank may be appliedio rotate the protector, and the protector being formed with inwardly projecting lugs adapted to engage the screw threads of a p As an article of manufacture a pipe protector of the character .described embodying a sleeve, the sleeve at its upper margin being formed with inwardly projected stops struck from the body of the sleeve to thereby leave slots above the stops, said slots constituting means whereby a shank may be applied to the protector to rotate it, the protector below said stops being formed with integral inwardly projecting tongues struck from the body of the protector and adapted to engage the screw threads of-a pipe.

3 A pipe thread protector of the character described comprising at protecting sleeve made of thin metal, the sleeve having tongues struck downwardly and inwardly adjacent the upper endof the sleeve to constitute stops, the openings thus left constituting means whereby an implement may be applied to rotate the protector, the protector being formed with integral inwardly projecting tongues extending toward the upper end of the sleeve, the last mentioned tongues being resilient and adapted to engage the screW-threads of a pipe. I

In testimony whereof I hereunto affix my signature.

BENJAMIN BROWN STEIN 

